[llvm] Use std::nullopt instead of None (NFC)

This patch mechanically replaces None with std::nullopt where the
compiler would warn if None were deprecated.  The intent is to reduce
the amount of manual work required in migrating from Optional to
std::optional.

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp b/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
index 4478d8d..9d63b5e4 100644
--- a/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
+++ b/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
@@ -817,8 +817,8 @@ static Error readCoverageMappingData(
   // In Version4, function records are not affixed to coverage headers. Read
   // the records from their dedicated section.
   if (Version >= CovMapVersion::Version4)
-    return Reader->readFunctionRecords(FuncRecBuf, FuncRecBufEnd, None, nullptr,
-                                       nullptr);
+    return Reader->readFunctionRecords(FuncRecBuf, FuncRecBufEnd, std::nullopt,
+                                       nullptr, nullptr);
   return Error::success();
 }